02/04/2014 8
NI804
Whether this unit is sitting on or attached to an inlet cabinet, field designed inlet cabinet, or horizontal
supports; verify proper support and mechanical strength is provided within the system installation.
Rubber isolation pads should be used where possible to reduce sound and vibration transmission.
WARNING
WHEN HANGING THIS UNIT, THERE MUST BE UNDER SUPPORTS WHICH DISTRIBUTE THE
HANGING CHAINS ACROSS THE SURFACE OF THIS UNIT, DO NOT SIMPLY DRILL A HOLE
AND USE A COUPLE OF HANGING BOLTS.
For information, factory optional inlet cabinets can reduce cost and simplify installation, see previous
pages.
When installing the unit maintain a minimum clearance of 36” in front of the unit for service accessibility.
Upflow, Air Conditioning
As stated above, the return air should enter the bottom of this cabinet. Suggest using Electro bottom filter
cabinet (page 2) or field constructed equivalent. The A-coil will be mounted above the blower in either a
case coil or field constructed plenum.
Downflow, Air Conditioning
Similar to upflow above, the air conditioning coil is positioned at the blower outlet. Depending upon the
coil type and drip pan it is positioned in a field constructed plenum as required.
A typical packaged 20” x 20” filter cabinet could easily be installed at the blower inlet opening.
Horizontal, Air Conditioning
Similar to upflow above, the air conditioning coil is positioned at the blower outlet. Depending upon the
coil type and drip pan it is positioned in a field constructed plenum as required.
As horizontal, the return air would enter the blower end of the cabinet with a typical packaged 20” x 20”
filter cabinet.
Upflow, Make-Up Air
The non-tempered air should enter the bottom of this cabinet.
An appropriate inlet damper, insulated inlet
ducting and high quality (washable or moisture tolerant) filter are required.,
Downflow, Make-Up Air
The non-tempered air should enter the top of the cabinet as the unit would be flipped 180°.
An
appropriate inlet damper, insulated inlet ducting and high quality (washable or moisture tolerant) filter are
required.
A typical packaged 20” x 20” filter cabinet could easily be installed at the blower inlet opening.
Horizontal, Make-Up Air
As horizontal, the return air would enter the blower end of the cabinet with a typical packaged 20” x 20”
filter cabinet.
An appropriate inlet damper, insulated inlet ducting and high quality (washable or moisture
tolerant) filter are required.
Blower Motor Orientation
If the installation is not upflow, the blower motor shall be positioned so the power and control connectors
are down. This will prevent water from entering the blower motor through the connector housing
opening.
Loosen motor mount clamp and rotate motor accordingly.
Before tightening motor mount clamp be sure the blower wheel is properly centered inside the blower
housing.
